Your house edge is enough good but I have a doubt about the gambling on telegram. Also, you are accepting only lightning network of bitcoin. I think you should increase the limitation by adding more coin and also by adding other network as well with lightning network. Also, please answer if it is possible what will happen if anyone deposit with mainnet of bitcoin.
I agree about adding bitcoin. If he's accepting LN then he should also accept bitcoin itself. But maybe there's a technical issue that for now, he's good with LN.
But soon, might add up to bitcoin so these two will be the main crypto being accepted. Did anyone already play and tried this game on telegram? I guess this is likely the 2nd or third time around that I've seen someone developed something like this.